The superconducting ground state of newly reported ZrIrSi is probed by means of μSR technique along with resistivity measurement. The occurrence of superconductivity at TC = 1.7 K is confirmed by resistivity measurement. ZF-μSR study revealed that below TC, there is no spontaneous magnetic field in the superconducting state, indicates TRS is preserved in case of ZrIrSi. From TF-μSR measurement, we have estimated the superfluid density as a function of temperature, which is described by an isotropic s−wave model with a superconducting gap 2Δ(0)/kBTC = 5.1, indicates the presence of strong spin-orbit coupling. {\it Ab-initio} electronic structure calculation indicates that there are four bands passing through the Fermi level, forming four Fermi surface pockets. We find that the low-energy bands are dominated by the 4d-orbitals of transition metal Zr, with substantially lesser weight from the 5d-orbitals of the Ir-atoms.
@article{arxiv.1903.08581,
title = {Probing the superconducting ground state of ZrIrSi: A $\mu$SR study},
author = {K. Panda and A. Bhattacharyya and D. T. Adroja and N. Kase and P. K. Biswas and Surabhi Saha and Tanmoy Das and M. Lees and A. D. Hillier},
journal= {arXiv preprint arXiv:1903.08581},
year = {2019}
}